© Edwards Limited 2008. All rights reserved. Page 13
Edwards and the Edwards logo are trade marks of Edwards Limited.
Installation
A546–00–880 Issue C
z The iGX system can be secured to the floor by fitting suitable bolts or studs (not supplied) through the 17.5
mm hole in the seismic brackets.
z If vibration transmission to the floor is a concern, suitable vibration isolators (not supplied) should be fitted
between the seismic brackets and the bolt or stud.
z Although the iGX system is supplied with four seismic brackets, two brackets are capable of protecting the
system during an earthquake. The system can therefore be secured as shown in Figure 7 for example, to
reduce the effective system footprint if required.
z If all four seismic brackets are to be used, ensure that the bolt spacing is adequate for the floor strength and
loads anticipated.
3.2 Lubrication
The iGX system is given a charge of oil before it leaves the factory. There is no requirement to check and adjust the
oil level.
3.3 Connect the iGX system to your vacuum/exhaust system and
interstage connection (if fitted)
Do not reuse any O-ring or O-ring assembly and do not allow debris to get into the iGX system during installation.
When you connect your iGX system to your vacuum system, take note of the following:
z To g e t t h e be s t p u m pi n g s p e ed , e n su re th at th e p i peline which connects the vacuum system to the iGX
system is the minimum length possible and has an internal diameter not less than the iGX system inlet-port.
z Ensure that all components in the vacuum pipeline have a maximum pressure rating which is greater than the
highest pressure that can be generated in your system.
z Incorporate flexible pipelines in the vacuum pipeline to reduce the transmission of vibration and to prevent
loading of coupling-joints. We recommend that you use Edwards braided flexible pipelines. The pipelines
should be suitable for 110 °C.
z Adequately support vacuum/exhaust pipelines to prevent the transmission of stress to pipeline coupling-
joints.
z Incorporate a pressure gauge in the inlet pipeline, so that you determine that the iGX system operates
correctly.
z Yo u mu s t b e a b le to i so l at e th e i G X s y st e m i n le t f r o m the atmosphere and from your vacuum system if you
have pumped or produced corrosive chemicals.
The outlet of the exhaust pipe can have a check-valve (optional accessory) fitted which prevents the suck-back of
exhaust vapours after the iGX system is shutdown. The check-valve also provides additional attenuation of the pulses
in exhaust pressure.
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